preg_replace_callback_array

(PHP 7)

preg_replace_callback_array — Perform a regular expression search and replace using callbacks

说明

mixed preg_replace_callback_array ( array $patterns_and_callbacks , mixed $subject [, int $limit = -1 [, int &$count ]] )

The behavior of this function is similar to preg_replace_callback() , except that callbacks are executed on a per-pattern basis.

参数

patterns_and_callbacks: An associative array mapping patterns (keys) to callbacks (values).
subject: The string or an array with strings to search and replace.
limit: The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).
count: If specified, this variable will be filled with the number of replacements done.

返回值

preg_replace_callback_array() returns an array if the subject parameter is an array, or a string otherwise. On errors the return value is NULL

If matches are found, the new subject will be returned, otherwise subject will be returned unchanged.

范例

Example #1 preg_replace_callback_array() example

  <?php
$subject  =  'Aaaaaa Bbb' ;

 preg_replace_callback_array (
    [
         '~[a]+~i'  => function ( $match ) {
            echo  strlen ( $match [ 0 ]),  ' matches for "a" found' ,  PHP_EOL ;
        },
         '~[b]+~i'  => function ( $match ) {
            echo  strlen ( $match [ 0 ]),  ' matches for "b" found' ,  PHP_EOL ;
        }
    ],
     $subject
 );
 ?>

以上例程会输出：

6 matches for "a" found
3 matches for "b" found

参见

PCRE Patterns
preg_replace_callback() - 执行一个正则表达式搜索并且使用一个回调进行替换
preg_quote() - 转义正则表达式字符
preg_replace() - 执行一个正则表达式的搜索和替换
preg_last_error() - 返回最后一个PCRE正则执行产生的错误代码
Anonymous functions
callback 类型的信息